Marketplace Co-op is the most generic white-bread name I think I've heard for a new store in years. Why not call it Blandco, a subsidiary of Meh, Inc.?
While I know PI isn't ever coming back and the elements that worked couldn't sustain the elements that didn't, I think there needs to be some more entertaining elements in there, the sort of thing that makes it more of a destination for people who aren't about shopping. Sure, you've got the movies playing by and large the same movies playing in any other mall multiplex in America (albeit with perhaps better audio and an option for dine-in service). Yes, there's DisneyQuest, an indoor interactive entertainment experience so dated, the AA's in Carousel of Progress laugh at it. The restaurants have cool themes and from what I hear there are performers at Raglan Road (never at the times I've been, though). Cirque is about it for can't see this just anywhere entertainment. And then there's Splitsville.
I once wrote (in all seriousness) that I'd love for the large meeting space at Saratoga to stop being used for DVC model units, because I feel that for the dues we pay there should be more unique offerings made to guests (I know, ain't gonna happen) and I suggested a dinner theater, to complement Hoop De Do and the Poly Luau, a show-within-a-show where it's by and large a horse-racing themed vaudevillian type show, but we also see things supposedly happening behind the scenes as well, performers who are dating on the sly, grande dames trying to get a little extra stage time, stagehands who are clumsy and "Gilligan"-ing up the proceedings, etc. Since that'll never happen, I still think a dinner theater or dessert theater would be a great complement to the area. Better still, near where I work, there is a former movie multiplex that was converted to small off-Broadway sized theatrical venues, the New World Stages. I saw Evil Dead-the Musical there a while back. It's set up makes it relatively easy for shows to set up and move out, and there's always something to see there. I think it's a great template for more entertainment options in DtD. They can use it for intimate revues, sillier shows, comedy geared to adults, and even workshop future adaptations of Disney movies (coming soon, Brother Bear the Musical?). I know some people are born to shop, but at no point have I ever been on property and thought "Gee, I wish there were more places to spend my money." Especially in Orlando, which I believe is Apache for "Land of a Million Outlet Malls." Maybe a few less shops and a few more Things To Do is what the area needs.