What would you like to get out of it? What amount of money would you have to get to make it worth, listing, packing, shipping? We can speculate on what it would hit, but you more likely know what you want out of it.
I briefly looked at the other recent $20 Superhero sets, and behind Wolverine's Showdown and the Spider Cycle this is probably the third best seller. It also gets over MSRP and until recently was available for $15. The Cosmic Cube Chase is getting $35 now and Wolverine's Chopper is at $62, both retired. The build is better on the Cosmic Cube, but the minifigs are better on Wolverine's Chopper, IMO. This set has good figures and a good build, I can see this set getting to $50, maybe $60, within a year of retirement, but not near as fast as the WC did.
I would guess that Lego will release a set with Wonder Woman in her outfit from the new game, which will probably hurt this sets potential, I just don't think she is as popular as the WC figs. They may release a revised Superman too, but we had all those MOS sets, so who knows.
Edited to add that it looks like the Man Bat set is similar in sales to this one and also over MSRP even though Walmart has it for $16. I would keep your eye on that one too, although it is further out from retirement.