Here's the video with a guy covering the contents of rime of the frost maiden. I've set the time to the specific page where it talks about the time travel and obelisks so pause and read.
Seeing as the obelisk deletes itself after use I don't know about a multi-realm shaking event just yet. Especially since the function is just localized time travel I don't understand how they'd use it for a multi-planer crisis.
As for MTG merging with the Realms some how or the overall D&D universe I have my doubts for now as the FR MTG set is replacing a core set and core sets never had story or lore associated with them for ages. If they start writting articles/stories set in FR when the set is releasing then I'll worry about them pulling that stupidity.
Also, what the hell WoTC in that bit with the time travel they recommend DM's check out other FR products to "get a lay of the land" in that time period. Like they couldn't even recommend which products at least or at least give a page or two detailing the immediate region and it's neighbors?
Also, Gyor why don't you keep these threads under the main 5e thread? Not every announcement or rumor needs to be its separate thread for 5e.
This FR set having a story has been confirmed by the D&D boss Ray Winnger, with the D&D team working with the MtG team and they staight up said they aren't doing a Core Set in 2021, not that they were setting a Core set in the Forgotten Realms. Also its also been mentioned by a member of the MtG team that its new cards, Core Sets are partially new cards, partially reprints. It drives me nuts that folks assume that because DDAitFR took Core Set traditional summer slot that it was just going to be a Core Set with a setting without any evidence.
Dungeons and Dragons: Adventures in the Forgotten Realms is a major experiment in the words of a MtG team member who worked on the set. So its clearly the 2021 innovation Product not Core Set: Forgotten Realms.
Its not like they haven't stopped doing Core Sets before, but you'd think it was given how folks seemed to think its a stealth core set.
Personally I think its going to be more like Ikoria, Commander focused, but mostly black border Stardand form. So this is my guess its going to come with 5 Commander Decks, tied to 5 major Factions (The Harpers, The Zhentarium, The Guantlet, The Emerald Enclave, and The Lords Alliance). I also think Adventure from Eldraine will make a major return, that it will be Legendary heavy (Lands, Creatures, ect...) and bring back "Historic" key word like Dominaria was. Maybe see the return of Sagas too. Some folks think party will return from Zendikar, I think the mechanic is too confining for FR class structure and has practical issue, but fun.
And I think that something will try and use the Obilesks, but something will go wrong, it doesn't go right and the D&D Multiverse gets hit with its own version of Time Spiral Event that MtG experienced, and somehow the two events will end up linked some how. This will allow them to use creatures and Locations from any time period in the Forgotten Realms, and gives the D&D team an excuse to release a Forgotten Realms Campaign Guide book, and they can link the two Multiverses together, some how and address issues that both multiverses face and make changes to them.