I'm just glad that WWE realise what they have with LA Knight and are puttig him out there in prominent positions on TV. I think they will eventually come to an agreement, he's definitely in a strong position right now to negotiate.
As far as what a 'mega-push' would look like for him, I think it's almost certainly gong to be a mid card title run at this point, and that's far from being a bad thing. If you look at how they're treating the IC title with Gunther at the moment, then giving LA Knight a similarly strong run with the US title on Smackdown would be great to see.
IF he is to win a world title then it would have to involve a switch to Raw to go after the WHC, because nobody's taking the WWE title off of Roman unless your name is Cody Rhodes. Maybe a Royal Rumble win could facilitate giving him a WHC shot at Wrestlemania, which could make for a big moment for him.