Yeah, you would need initiative to play, either Regular (which is determined by the numbers) or Special (when an SA causes removal of all characters in battle on your side). Note that you cannot play until
all abilities resolve, so you must let Gomer band if your opponent desires. And if they do not, AUtO is winning the battle by the numbers so you do not have initiative. You could throw down a dominant, since they can be played outside of initiative, but your opponent has the first play for enhancements.
So if you're asking if you can throw down an ITB before they play Plot off of their initiative, the answer is no
