Would DT and Haken be likely? (Or do they have some kind of childish grudge against Haken for the whole Shattered Fortress thing with MP? )
Why would they have a grudge? I am pretty sure they don't care.
But why do you think DT/Haken is likely? I have not heard any rumblings that would make me think so.
I don't think it's exactly "likely", but it would be awesome nevertheless. Plus, it'd be cool for both bands. Haken have a lot of younger fans, at least here in Germany. I have talked to people at Haken concerts who aren't even that much into prog or so, they have never heard of Gentle Giant or Symphony X or anything.. they just like Haken.
On the other side it would be cool for Haken, I don't think I have to mention why.
But I would be curious what MP would say about that though