Could Daemon have wanted the dark spores in order to create Arkadimon?

Answer 1

Digimon Adventure 02 suffered from the several writers disagreeing with each other on what direction the season should take and as result many plot points were never really elaborated and left hanging. That was one of these moments, and as a result there is no way to possibly know what he wanted to do with the spores. In fact, his appearence is so short and sudden he feels like a character out of context.

But these seeds are small leftovers from Millenniummon's original form, they are an incredibly powerful source of dark energy as MaloMyotismon shows in the finale. I presume it is the kind of thing any Digimon with evil intent would like to use.