I played ground pound with Mars base self destruct sequence out. According to the rules if you skip a turn you skip every phase of that turn, which would also mean the start of the turn when ground pound would be destroyed. So I could skip my turn every turn and heros would never take damage?
Wanted to see if we just got a lucky combo or we miss something in the rules.
It depends.
Any start of turn and end of turn effects happen in the order they were played, so if Self-Destruct Sequence came out and then Haka played Ground Pound you choose whether or not to skip your turn for SDS and if you don't you go on to look at any other start of turn effects.
If Ground Pound is played first and then SDS comes out, you destroy Ground Pound first and then get to decide if you want to skip your turn for SDS, not as beneficial that way around.
Things can still mess up your plans, villains can destroy ongoing or environment cards, which would stop your choice, Environments can also do this (though not in Wagner Mars Base IIRC) or other heroes might destroy the Environment, also Haka might decide that skipping their turn every round is boring and stop doing it. Just because it's good for the team doesn't mean you have to do it, the primary rule here is "Have fun saving the Multiverse".
Welcome to the forums Timebeing, are you the same timebeing that steals all my stuff in RPGs?
Actually, I believe this was previously discussed with other cards.
Short version: You will always lose Ground Pound - timing is irrelevant.
Long version: Start of turn triggers take effect, then start of turn decisions are made. In this case, the Ground Pound is destroyed at start of turn, then you decide if you want to skip the rest of your turn. I have to have a start of turn phase and Ground Pound goes away at that point.
Anyone else remember that conversation?  Or am I just wrong? 
I'd be very interested in reading that conversation. Making an in-game distinction between start of turn triggers and start of turn decisions seems way off the mark and incredibly unintuitive.
The way I play is more inline with what Matchstick said
I've never seen a distinction between start-of-turn triggers and decisions.
The start of turn decisions ARE start of turn triggers, if you ask me. At the start of your turn, you make a decision.
If we look at Spiff's clarifications document we get
Yep, I hate that I didn't include links for absolutely everything from the beginning. When I first started the FAQ, I wasn't taking it as seriously as I should, so I figured "who will care"? I now know the answer to that question. :)
That makes sense to me
My understanding of Start Phase actions is as has been stated above - they occur in the order in which they were played. So if Omni-10 managed to put out all his components and then Mars played the Self-Destruct Sequence, at the start of his turn Omni-10 would be able to have all his components do their stuff (in the order they entered play) and then decide if he wanted to skip his turn to add to the countdown. Even better if he has a Bio-Engineering Beam handy, of course ;).
Sounds great - happy to be wrong, as long as we have an answer. 