Ken Rosenthal has this:

One major league star, multiple prospects and a seven-year, $140 million contract.

That's all it will take to add Johan Santana at the Twins' current price — and the likely price for a starting pitcher of his caliber.

The Twins, rival executives say, want at least one big-name major leaguer for Santana, a player such as the Mets' Jose Reyes or Yankees' Robinson Cano.

He also notes that a 7 year, $140 million dollar deal would likely be the minimum that Santana would sign. So, it'd probably need to be something like Cano, Joba/Phil/Kennedy, a very good prospect and something else. Maybe they'd take Melky in place of a very good prospect (or, possibly more likely, as the something else), but that would seem unlikely. Is it worth it?

If they take Cano, Kennedy, Tabata or Horne (not sure) and Melky, that leaves us with major league openings at second and center field, as Johan would obviously fill Kennedy's rotation spot. Though it's not ideal, we do have Matsui, Damon and Abreu and that could be our outfield. Maybe Shelley Duncan would get time out there in left instead of Matsui. The loss of Melky, while a minus, doesn't really concern me. What really concerns me is who plays second base. Wilson Betemit? Alberto Gonzalez? The free agent market is pretty slim. Tadahito Iguchi? Cano is a tough one here because he's one of the best second basemen in the game, he's young and he's under our control. Cano is what breaks this deal. If that's what they want, then I have to say pass.

If it's Kennedy, Horne or Tabata and Melky, I'd think about that. Add Cano and it's just too much. Santana's great, but I'd rather rock with what we have than do that deal.

Via Ben.