Who knows really? It's all very vague, because it's not an actual development plan, but just a marketing image.
As far as the existing Disneyland, there's really only two options to get this walkway out to a bridge structure over Disneyland Drive;
1. South of the Haunted Mansion and north of Pirates, along the current backside of New Orleans Square.
2. The backside of Critter Country, between the ride warehouses for Winnie The Pooh and Tiana's Bayou Bash N' Splash.
Either way, big changes are coming to New Orleans Square or Critter Country. You could even see them being able to expand New Orleans Square a bit beyond the existing berm to get to a bridge. If they do this right, and avoid cheap budgets and off-center windows, this could be a chance to expand and plus up New Orleans Square on the scale of a "
Who Woulda Thunk It?!". This could be a great thing!
Or, by the time they get around to doing this a decade from now, the executives will have all changed and they'll go DCA 2001 cheap on this and it will totally suck and be a giant disaster.
Who knows? Anything is possible at Disneyland!
Yes. If this actually happens as it's shown, Disneyland will be the most massively developed and intricately stitched together Disney park in the world by a long shot. I can't think of a more fitting way for Disneyland to celebrate it's 75th birthday than that.