I think what he's saying is that with the potential CityWalk Uni Store expansion, they could decide that the main Universal Store in Studios is unnecessary and demo it to build a Minions Playplace/Diner right in front of the entrance for DM:MM.
I don't think it's all too likely to happen, I assume that existing Universal Store makes quite a bit of revenue with it's placement and all. I've never heard the RRR Silly Fun Land overlay idea though!
Ahh ok. Yeah - they’re not gonna do that. That store ain’t going anywhere.