Short lists like this is what happens when I no longer have internet at home. And yes, I LIVE!
1.Hook disappears and not even the other Constructicons can sense him. The Decepticons all think he was either kidnapped or killed by the Autobots. The truth is though, that he left by choice. He was, frankly, sick and tired of his life.
2.Rumble finds an interesting book. One that he loves. And now he's on the hunt for a human child because he himself can't save them. Crossover with The Neverending Story.
3.Prowl doesn't recharge. Ever. And he doesn't need to.
4.The twins (Sunstreaker and Sideswipe) raise Cliffjumper, who is of Seeker descent. Not that they know of his ancestry. No, that would make things too easy for them.
5.Cliffjumper is badly injured and isn't expected to survive. Only one mech believes he still has a chance.
6.Praxus wasn't just on the surface. Not that any non-Praxian knew this. There are hundreds, perhaps thousands, of survivors hidden deep beneath the ruined city.
7.Cliffjumper: Supposedly of Seeker decent. Seekers: Protectors of Sparklings and Younglings. Cliffjumper's instincts take over.
8.I've seen 'Prowl was a thief before the war fics'. But what if his past was darker than that? What if, before the war, Prowl was an assassin? Or, if he didn't hire out his services, what if he killed those mechs and femmes the authorities couldn't catch? I don't think Optimus would want a killer like that as one of his officers, at least early in the war, so it makes sense that no one knows what he used to be. But why did Prowl join the Autobots, and not the Decepticons, if the Autobots were the ones that couldn't stop the ones he hunted in the first place?
9.One in ten of Praxian pregnancies results in miscarriage. Of those, one in three carriers follow their sparkling into death. Even 'healthy' pregnancies are difficult. Praxians have kept this a closely guarded secret as they see it as Primus' disapproval/punishment over some mystery offense. But what will happen when Prowl gets pregnant and everyone's wondering why he's more resigned than excited? And why Smokescreen and Bluestreak are so terrified for him?
10.2007verse (ignores sequels) crossover with BTVS. Prowl and Red Alert crashed on Earth at least ten years before Bumblebee arrived. They landed in Sunnydale, California (AKA the Hellmouth). They get involved in protecting humans from the supernatural and eventually join the Scoobies and stay with them throughout everything, including the sinking of Sunnydale. Eventually, though, they have to join up with Optimus and his group (and keep them from finding out Earth's supernatural is more than just stories). BTVS' series finale takes place before the 2007 movie. Also, I'd like Prowl to be a motorcycle (but with G1 personality and colors), because I like the idea of him being small. It's not necessary though.