There are over 1900 titles out there.
Matching the titles existing would net about ~680k chaos packs burned.
There are ~2.76m packs out there so that's about 24.6% of packs.
(this does not include scorcher, burninator titles)
Perhaps you're referencing total packs that were printed which as we know was excessive but even still roughly 4.5% of all total that have ever been in existence.
I submit 680k packs is a HUGE deal. I doubt we would burn that many but would be an amazing dream. That's 3.4 million cards!!
RE: Chaos Pack Burn Event - Proposal