I saw this and thought, "Wait, we have modpacks that extend the story, the in-game content, the involvement of the community. What is this going to offer, and what will it cost the modding community?" Why do we need a marketplace for this, honestly? It seems Microsoft is trying to squeeze money out of a community that loves the openness and freedom of Minecraft, including its mods and packs. We have people willing to create new worlds and experiences for the joy of creating. If they leave the modded community alone, fine. If they block that content... There will be a problem. But, this is just my opinion, in rant form.

I think the poster was talking about building your own modpack of sorts. That gets tricky, because some mods really don't like each other or are dependant upon others to function properly. We are lucky to have resources like Curse, ATLauncher, and FTB that allow users to pull together modpacks.