Yeah, the world is a different place now and the kids who watched atleast the original 3-4 seasons are now college-aged, many have moved on from Digimon completely, re releasing old merch is not going to bring them all back. Sure, for those of us still interested in great but that target audience on the whole has moved on. All they can do is move forward and appeal to the next generation of young kids.
I would like the see Digimon cards relaunched as atleast now, from what I've noticed, the Pokemon and YGO TCGs popularity are low. The game might need some revamping, I found it harder to play then Pokemon or YGO, but that might have been just me. I never got to play more then a couple of digimon card battles because Pokemon and then YGO came onto the scene and outshined it in popularity. Now if the Digimon franchise were to relaunch and aim at the current young kid population, it may come back strongly.
If it does, our only hopes of getting new merch or rereleases is if they decide to rerun the first 3 seasons and market the crap out of it, but its unlikely. We can just hope they plan to really relaunch the franchise with new stuff.