Tho im not a big fan of the trust, these something that makes me think that at least one of the two moives either SG1 or SGA will feature the trust, whether it will be part of the many plot or just a sub-plot i dont know.
why do i think this, well in the case of SGA the city is now on Earth, what better prise could there be for the goa'uld that are in charge of the trust than atlantis, the most powerful piece of technology currently in the milky way. if the got control of atlantis they could essential act out revenage against earth nd try an rebuild their empire. i know the trust havent factered big into SGA appart from season 2s "Critical Mass", but theier presence in the movie could explain the limited crossover of Daniel, Teal'c & Carter thats been metioned by JM.
In the case of SG1, since we know that its a Jack centric movie, i kinda find it hard for them to come up with a good enough reason for jack to be offworld (especially since baal is now dead), or in fact be the complete centre to the movie if these a major crisis. (yes there could be a foothold at the SGC etc when he's there but its hardly anything new). that's why i think the plot may have something to do with the trust trying to get at Jack since he's the head of homeworld securty, either to implant him or to kill him, leaving jack on the run only being able to trust SG1 for help.
what dose everyone else think??