Gaming is fun, and fun is for everyone
5E will do the planes, but it remains to be seen how. It could be a revival of Planescape, or it could be something more like Magic's planeswalker thing, or it could be Spelljammer, or maybe a cap-system Manual of the Planes with options for all three, and further development of whatever proves most popular. But the planes are iconic enough to be a sure-thing.
Honestly not the worst idea. It would be one nutty book for sure, to combine Spelljammer, Planescape, and Planeswalking into one metasetting ruleset.