This set still doesn't have a returning mechanic. I made
a thread about it earlier, but it was kind of a non-starter.
The only two returning mechanics that have held any resonance with the community as far as I can tell are split cards and DFCs, to emphasize the dual-sided nature of the plane. So I thought I'd just make a little poll to settle the matter.
If No gets 50% or more of the votes (winning ties), then we won't have a returning mechanic.
If Option 1 and 2 together get at least half of the votes, then we'll decide on what the returning mechanic should be in a later thread. If Option 1 > Option 2, then we'll have a vote between split cards and DFCs; if Option 2 > Option 1, then we'll have a follow-up vote between Cycling and Other.