I'd welcome a 2nd pulp adventure land (in DHS). DisneySea has its Indy-anchored Lost River Delta, next door to an original AL.I think if you tried to do an entire Indy land you would just end up with Adventureland.
Thoughts on the possibility of the new movie using "Young-Jeff-Bridges-From-Tron" technique to set most of it in the classic Indy period (e.g. 1930s)? 76-year old Ford could be used to frame flashbacks to a younger, action double with a digitally painted-on Indy face. That seems like a win-win to me (avoiding re-casting, but re-capturing the more youthful fun of the character). The tech has improved since 2010. And Spielberg has motion capture experience with Tintin.