Hm. I may be interested in this. Sound kind of cool, and I'm a big fan of character development and arcs. So, how would our characters meet? Would they all happen to jump to the same world at the same time? How widely known is it that some people can jump? 

As for suggestions for the first world, do something you know. I also wouldn't mind something medieval and magic themed, like Skyrim or Fire Emblem. Also, props dude, this idea is ingenious.