I think they should form a supergroup in the vein of CSNY to play new music: “Lee, Lifeson, Copeland and Vedder”.I don't think that Rush should carry on without Neil, but one thing I would love to see is a tribute concert for Neil with Geddy, Alex, and all of the great drummers that were influenced by Neil. Doing classic Rush songs with a different drummer on each song. Capture the video in 4K (or 8K) and get Steven Wilson to do an Atmos mix of the performance.
Spread the word.