I hope they lead off with the Urza Saga, as most people agree that is the greatest storyline in Magic.
I don't know why you'd think most people agree on that. Urza's Saga came out not too long after I started playing Magic, right around the time I'd finally gotten some grasp of the game and was really getting into it. It's a set I have special fondness for. But I don't know that even I would agree that it is the greatest storyline in Magic.
I suspect that the answer varies depending on which medium is emphasized. The most direct way that we get exposed to storylines is through the cards themselves, but that part of the story is always incomplete. The next most direct outlet for lore is material released by WotC that comes packaged with other product, such as the booklets that come in fat packs and such. But there have also been other outlets: comic books,
The Duelist, official webcomics, computer games, short stories, and novels.
I used to read the novels, but I haven't in many years. There seemed to be a pretty severe drop in quality in the early 00's, and I lost interest, deciding that the newer books couldn't measure up to the older ones. I used to think that this was because Wizards of the Coast had previously recruited an eclectic mix of established authors and new talent to write stories set in their world, but then they shifted to a more formulaic novelization of the sketched out storylines they were devising for new sets under the block system. While that did change things, in retrospect most of my impression of a drop in quality could be attributed to a single author. Maybe the set-derived novels turned out to be fine on the whole. I don't know.
The Urza's Saga storyline was part of the vast Dominaria/Weatherlight/Yawgmoth/Legacy/etc. epic, which wouldn't really translate well into movies. Also, Wizards of the Coast has an obvious stake in not promoting prerevisionist lore over the newer stuff. Even in some fantasy scenario in which they're able to create successful movies or a TV series, leading with anything prerevisionist seems highly unlikely. Also, some of the playerbase from when those stories were new has left and isn't coming back, while the overall size of the playerbase has increased dramatically. Yeah, I grew up with Urza and Mishra, but that's me. Jace and Chandra are
way more famous now.