Turning Tyranny of Dragons into a massive Plane hopping adventure
So I love Tyranny of Dragons in concept. It was the first module I ever played and I love the idea of it. But something always felt missing. Like it's supposed to be this huge adventure about a diety brought out of imprisonment and the party needing to stop that. But it's just stuck in the Sword Coast and in all honesty I feel like with everything now available in 5e that a lot more could be done.
I'm very much in the early stages of writing but here's the basic concept. Have an edited version of HotDQ to start out, leading up to a big twist at what would be the end of chapter 8 of this rewrite. The Cult isn't just in the Sword Coast. They're widespread through the multiverse and they've got their eyes set on the masks that are all over the Planescape after the Cult was disbanded all those years ago.
After certain events the party goes out on their newly acquired Spelljammer to not only stop the Cult from finding their Chromatic dragon masks (although this would likely prove mostly futile. Doing nothing much but slowing them down) but also get their secret weapon. The Metallic dragon masks. This takes them all over the multiverse and would take up most of the back half of the campaign. (I do have the locations of the masks. Some specific, some vague. If anyone is interested)
The final fight boils down to, can the party stop Severin (or whatever NPC I make to replace him as I have thought of making new NPCs for The Wearers of Purple) before Tiamat is released. If it's not possible then I imagine someone uses the Mask of the Platinum Dragon to summon Bahamut. The party goes to finish off Severin and after that is done Tiamat binds Bahamut in Avernus, since I'd be using her statblock from Fizban's, and in a semi-weakened state faces the party for the final showdown.
Any thoughts on this? I know it's a bit crazy but I do have a lot of resources for the Planescape setting to potentially make this interesting enough to work