There's not much money in adventure games these days though, so I can't see a publisher being willing to sink the huge amount of money LucasArts would demand to be swayed.
Even though the LucasArts games were superb, these days their licenses don't really hold the value they did. They've gone the same way as many classic Spectrum/Atari/Amiga games, which were once household names but now most people below 20 haven't even heard of, say, Dizzy
. A publisher will look at this and just decide it isn't worth the risk or money. It's particularly bad in Grim Fandango's case because as we all know, it wasn't really considered a runaway success
like Monkey Island was.
Don't get me wrong, I'd love to see some old LucasArts licenses resurrected. For example, Vivendi is now Double Fine's publisher, and it's not beyond the realms of possibility for them to buy the Full Throttle rights off LucasArts and then assign Double Fine to do a sequel. It's just insanely unlikely to actually happen.