It's expected that these will all be out and available on May 1st, 2020, and we've got no reason to believe this set's release will be delayed beyond that we shall see!
It also stays on the battlefield, giving you huge upside if you can flip it, and it helps with mechanics like delirium, too
However, this is just speculation because there are lots of experts who say reprinting these cards would still not affect their prices all that much (at least for the original version from older sets, that is)
I dont personally play Manglehorn much, but combining removal with a decent stax piece that preemptively stops Dockside combos is pretty good
As the examples above show, these can represent multi-stage boss monsters or a quest and its reward