DEN will not be a base. I have it on good authority that it will not reopen for the 4th time. United would not agree to the commitment for >1 year of flying. IAH is a possibility, and slightly more likely.
Do not come to RAH thinking of anything other than ORD and east for flying or bases. The DEN-BUR is probably going away because we don't have reliable MX reachback anywhere west of the Mississippi.