Official teaser of gameplay for Sonic Frontiers were released on official media of Sonic the Hedgehog.
a) Some kind of Boosting, but without effect, and seems like without giving damage. Used on rails as well.
b) Some kind of puzzle or a useable object, looking like hamster wheel, which was activating some mechanism (?).
c) Combat ability to give damage after running full circle around the enemy.
d) Homing Attack, which is continuing with close combat combo, like Chaos Attack of Shadow from Sonic 06.
e) Some kind of Whirlwind, visually looks like combination of Heroes’ original Whirlwind attack and Adventure 2′ Sonic Wind.
f) Railing. Who would’ve thought.
g) Bossfight with big thing and metal… “hand”(?).
Assuming from what we’ve seen, obvious is that the game will have much deeper combat system. Might be leveling system, or maybe even inventory. Locations seems quite opened and free for exploring, and yet, linear sections like the ones with railing still present. We already seen that the game is inspired highly with The Legend of Zelda: Breath of the Wild (leaving the trailer for people to compare):
With TLoZ:BotW Frontiers is united by quite alike visual style, opened locations and gameplay basics (which we saw on the teaser). But also, from the new information, we can assume the game being also alike to Shadow of the Colossus, which also united with Frontiers by style elements, movement mechanism and similarity of bosses design.
Trailer of Frontiers, released in December, also showed similarity with SotC.
Full showcase is announced to be on June 1st at 9am Pacific / 12pm Eastern time.