I find that unlikely for the following reasons...

1. We've seen the cover for AMOL and it looks like Rand is descending into the Pit of Doom with two women. Unless you think Demandred is going to take all of them on, along with Moridin, or that both the women will die, I don't see how it can happen.

2. Rand is a super-channeler Light avatar. Moridin may be able to stand against him if the Dark One directly helps him, but let's be honest, most Darkfriends kill themselves or can't even look at Rand when he's near. He's also probably stronger than all of the Forsaken together now. The Pattern is in complete flux around him. Demandred might just ignite if he comes too close to Rand.

3. Demandred's case isn't much better than other Forsaken. Moridin being the Dark avatar may have a better cause to meet Rand, and even Cyndane has been on a collision path since Lanfear died. Doesn't mean it will happen.

As it is, I actually do think Demandred will have a 'glorious' death. I think it's going to be a team effort. I can totally see Demandred falling to Logain and Cadsuane (or similar) who work as a team to kill him.

I think Mat will defeat him in Battle but not in combat. Mat couldn't even survive an offhand attack by Rahvin, there is no way he can take on someone like Demandred directly.

That said, RJ 'defeated' Demandred with a relatively unimpressive team in WH i.e. Flinn and two normal Aes Sedai. It's possible he'll paint a giant "L" on Demandred's forehead and have some lame duck like Moiraine kill him from behind. Villainy has always been impotent in WoT, but Brandon does seem to have some reserved hope for Demandred as a villain.