If I use "Archie's Ace in the Hole" or "Maxie's Hidden Ball Trick" to put a Mega Pokemon or Primal Reversion directly onto my bench, does my turn end?
No, it does not. The Mega and Primal Reversion rules say your turn ends "when one of your Pokemon becomes" that way.
Source: Primal Clash FAQ (2015-02-05), TPCi Rules Team (2015-02-05)