Everything I'm hearing is around EU initially having some sort of prioritized access into the park, because demand will be so high. So, for example, on-site guests at Premier hotels with multi-day park tickets get first dibs, then cheaper on-site hotels, etc. Essentially higher spend = better chance at access.
I'd heard it would be mid-year for the IT infrastructure to handle EU (e.g., around hotels, ticketing, etc.) to be ready to test. And even if you build in delays/rework/updates, I still think we'll hear about ticket options this year.
It's possible we might be able to purchase said tickets this year. I'm not sure whether UOR will announce the ticket types and prices before they're able to be purchased, or in parallel with them being released. I suspect that with leaks, we'll know about the ticket types but not prices, first.