Rocket League Items gear

Bungie explained exactly what rewards you can expect on its This Week At Bungie blog. Once you choose a side, you're with them for the long haul, and you'll get a reward from that side every Tuesday at Destiny 2's weekly reset through the rest ofc Rocket League Items.

If you choose the Drifter, you get one of each kind of Gambit Prime Synth each week, plus 100 Infamy points in Gambit. On the Vanguard side, you get 10 Vanguard Tactician tokens, a Boon of the Vanguard item that gives you extra tokens during Strikes, and an Enhancement Core each week. 

Both sides give a piece of Powerful gear each week--if you pick Drifter, you'll get a piece of Gambit gear; if you pick Vanguard, you'll get Powerful Vanguard Rocket League Items gear.