brent Funny what you remember
Got access to Disney+? If so, you could watch the whole 3-hour original movie before you watch the new one.
Along those lines, I believe that Disney offers a trial period, as do other streaming services, but I don't know the details. You could check with disneyplus.com for more info. If you don't want to keep it longer, you could try it for free long enough to watch both versions of Avatar, and maybe the first few seasons of Mandalorian, then cancel.
Even if it turns out that there's no free trial, Disney+ is only $7.99/month. Includes all the Avengers movies, all the Star Wars, Avatar, Harry Potter, etc., etc, When you compare that to watching one movie in a theater, it's a bargain. It's been years since I bought a bag of popcorn in a theater, but as I remember it was $4.95. It wouldn't surprise me to find out that a bag of popcorn now costs more than a month of Disney+.