I suspect the 49ers involvement is much ado about nothing. I think the price is set and known to both the Packers and Jets and basically a done deal that just isn't going to become official until draft day or close to the draft as a matter of tactical preference for both. Not buying that the 49ers interest is anything more than media driven speculation.
The 49ers also don't have anything other than a boatload of late 3rds this year, which would make them a pretty horrendous trade partner anyway.
Its the Jets. IMO, it's going to be one of the Jets 2nds and something else next year, probably another 2nd, and the only matter of dramatics is whether or not and how likely that 2nd next year can become a 1st.