Happy that they're doing real location filming & using physical things instead of opting for CGI. The less CGI, the better.

Tatooine seems pretty much confirmed, I don't really see why we need to go back there again, but does anyone want to take a stab at why Tatooine is a location?

Some guesses-

A Jedi or a dark Jedi goes to Obi-Wan's old abode to retrieve a jedi artifact
Luke Skywalker has set up a Jedi Academy there
Luke Skywalker has retired and become a moisture farmer
Luke Skywalker has retired and become a hermit
Luke Skywalker is now a senator representing Tatooine
Luke Skywalker is making a regular visit to the Darklighter family, which he has done regularly since Biggs died. This time however, something happens.
Camie & Fixer's kid is going to the Academy & Luke is invited to the sendoff party.
A Mandalorian attacks, & having last seen Boba Fett at the great pit of Carkoon, our heroes go there for answers
The planet is subjugated by a new threat
The planet has a stronghold controlled by a new threat
Luke is in the market for a gonk droid & knows a Jawa swap meet is where he can get the best price
Jabba's brother has set up shop & has put a price on the heads of the OT main characters. They get captured and are taken to the great pit of Carkoon & Boba Fett shows up- having survived the Sarlacc & living off wamprats for the last 30 years.
The destroyed jawa sandcrawler contained a copy of R2's memory, and under the enslavement of a now unified tusken nation, use all the planet's scrap to turn Tatooine into a new Death Star