Thoughts on Strongest Mega Evolution

I kinda watched Act III already, seems like Lysandre isn’t in the picture much for now…
In before I’ve looked at that post about SME!Steven and how the rock nerd and the lion seem to suspect each other a lot…
And Lysandre is Kalos royalty, right? So he should be able to use an Aegislash?
Hey, what if later Lysandre calls Steven to meet up to ‘swap information’? Since Alain isn’t there, it’s more likely they’ll get into an argument.
And then considering height differences, it’s definitely a piece of cake for Lysandre to just grab Steven into the air and throw him at something…
…and then get Aegislash to possess that rock nerd.
Then he can wait a bit and call Alain in, then leave the two to fight each other until something happens and he steps in ‘in the nick of time’.
It’s easier to explain that Steven tried to attack him but got possessed instead, since Aegislash is a Steel-type. That’ll get Alain to trust in Lysandre more than Steven.
Just my thoughts though~