While the odds that any of these combos actually break out on the tournament scene are probably pretty low, it's one of the only cards in Dominaria for which I can construct a scenario where it ends up breaking not just Standard or Modern
It cashes them in for triggers, tokens, or a straight-up win
The longer Heroic Outlaw stays in play, the more it can help, or be a threat.
Now that Universes Beyond has been around for a while, nothing is that surprising in MTG anymore
Evasive Maneuvers is a good basis for a Bant combo deck, but it needs to trim its theme down a smidge
A number of them synergize with artifact cards and +1/+1 counters, which are major themes of the block, and Weaponcraft Enthusiast has Fabricate 2