The new Battlefield will start off up in that tunnel and slowly descend out into the more open area below. The stage borders or collisions won't be any different, it's just for aesthetics. You'd be surprised what you can make by flipping a model upside down!
So, since I have no talent in rigging, I decided I'd just make models and hope people will rig them some day. I'm not that good yet, so my models aren't custom made, but made from Brawl parts or T-posed from Brawl trophies in some cases. I am good at T-posing, I have enough confidence to say that at least.
Welp, that option isn't there for me BUT ANYWAY, I finally decided to get back to stages.
All the stages I'll be making for a while will all be for my machinima 'Next Smash'. And what better way to start the marathon than a new Battlefield?
Admittedly, it's not much done yet. But I have the design, er, background design planned out. It's going to be somewhat stadium like, though not just another Pokemon Stadium rehash.