This is how Starscream becomes the Decepticon Leader goes in
[Starscream is flying when Soundwave contacts him]
Starscream: What is it, Soundwave?
Soundwave: Megatron's now reformed.
Starscream: You're sure Megatron was redeemed and the Fallen was killed?
Starscream: So who's now the leader of the Decepticons?
Starscream: [smirks] I was hoping you'd say that.
[Starscream flies back to base]
Starscream: Everything is going to plan. I'll see you soon, Rainbooms.
[He flies into the distance]