You see no rule against 3 players? I mean...I do. In regards to waiting, I already shared my thoughts on that above. I don't think you should wait until the trade deadline, you create now and you're good, because technically Wolf is retired right now and plays out his season in Stockholm anyways.
The fact is you don't have a player on Seattle right now, which is fine but you do have to retire Wolf right now as well. Hell I'm no the team that Wolf is going to, so why would I want to have this trade cancelled.