unfortunately I do have a notion that the map roster won't be very large anytime soon, looking at maps already aren't added very often to begin with. I'm slightly afraid PA is going in the direction of not having enough eggs to put in each basket. I see that they might be trying to make this game more of a general party game, but hopes to maintain development times on all fronts of the game. If they aren't careful they may not be able to juggle the concerns of both games and their differences.
Going into another experimental mode after Smash, being not as highly received from what I've seen, could be straining, though we'll see!
granted I've only been in this community for a short time, so maybe you guys have more to say on this