1.Leonard and Penny will finally have a formal wedding
Season 9 ended with the couple agreeing to have a more formal wedding ceremony in order to appease Leonard's mother Beverly (Christine Baranski). But the finale only got as far as the rehearsal dinner, with Sheldon's mom, Mary (Laurie Metcalf) and Leonard's never-before-seen father, Alfred (Judd Hirsch) hitting it off and (presumably) spending the night together.
Whether or not the duo's possible coupling will derail the festivities remains to be seen, but we're guessing that Leonard and Penny will go through with their plans. Why? Again, we're just speculating here, but fans have been waiting for that moment for nine seasons and the Season 10 premiere seems like as good time as any to make it happen. Plus, wouldn't it make a great parallel to have both Seasons 9 and 10 start with the same couple getting married?
2.We'll meet at least one important family member
In addition to introducing Leonard's dad, Season 9 also brought Sheldon's Meemaw (June Squibb) to the show. Chances are good that audiences will get to meet at least one more of the group's previously unseen family members in Season 10. So who could it be? Our money is on either Penny's mom or Howard's dad.
Viewers have been eagerly waiting to meet both characters for years now — and the latter in particular, as Howard has often talked about what it was like to not have his dad around growing up. Despite that, Steven Molaro recently told The Hollywood Reporter that "Howard's father has not been at the top of that list of guest stars," although he also acknowledged that the possibility "is always floating around." Still, Season 10 seems like an opportune time to introduce the long-awaited character, as Howard and Bernadette are about to welcome his grandchild.
3.Howard will have a meltdown about his pending fatherhood
We've already seen Howard endure a couple moments of panic over the prospect of becoming a dad. Still, audiences can likely expect to see plenty more of that anxiety surface as the pregnancy progresses further next season. After all, this is Howard we're talking about here — he's used to being the one that gets cared for, not the caretaker.
Fans can also expect to see Bernadette with an actual baby bump next season, as opposed to the barely there belly she sported in Season 9. "It's there. I think she's carrying the baby quite well so far, " Molaro told Glamour of the nonexistent bump. "Pretty soon, as we get into season 10, we'll start to see it more."
4.The guys will run into problems with the guidance system
In Season 9, Howard, Sheldon, and Leonard patented an idea for a guidance system that the Air Force later contacted them about. Though the idea has the potential to make all of them hugely successful in their careers, Howard was initially suspicious of the Air Force's interest and paranoid that the invention would be taken away from him.
Molaro has already confirmed that audiences will see more of the guidance system storyline in Season 10, and it seems to safe to say that the invention process won't be easy. For one thing, the guys tend to eventually bump heads anytime they team up to create something (remember the time they tried to make an app?). Plus, we have yet to learn exactly what role the Air Force will play in the invention, but we have a feeling their involvement won't happen smoothly.
5.Sheldon and Amy will take another major step
After breaking up, making up, and then finally consummating their relationship last season, it's clear that Sheldon and Amy have come a long way from when they first started dating. So what could be their next big step? Many fans have already started predicting that the two will either move in together or get engaged in Season 10. Since Molaro has strongly implied that he's not planning on switching up the Penny/Leonard/Sheldon roommate dynamic anytime soon, we're thinking it will be the latter. After all, that engagement ring from the Season 8 finale is still floating around somewhere.
6.It'll finally figure out what to do with Raj
Last but not least, we predict (or at least, really, really hope) that Raj will finally get the better storyline he deserves next season. In Season 9, it seemed as if the show didn't know what to do with him — or the matter of his love life, now that he can finally talk to women. While the rest of the gang was making moves and meeting new milestones, Raj was stuck in some half-baked, uninteresting romantic drama juggling two different girls. Hopefully, we'll see the end of that painful story next season and Raj can move forward to better things.
No official date for The Big Bang Theory‘s return has been announced, but it's likely that Season 10 will premiere in late September (like the previous nine seasons). The show will air at 8 p.m. ET on Monday nights on CBS, before switching to the same time on Thursday nights, following the conclusion of Thursday night football.