There was a Sonic-related announcement at SEGA FES 2018, but not what you may have expected:
SEGA have announced a SEGA AGES series for Nintendo Switch beginning this Summer with more than 15 titles initially planned. The three announced so far are Sonic the Hedgehog, Phantasy Star and Thunder Force III with development handled by M2.
Only confirmed titles are Sonic, Phantasy Star and Thunder Force IV but there will be more than 15 games starting this Summer in quick succession. Likely more after this but only 'more than 15' confirmed. pic.twitter.com/cHZTtlH415
— Japanese Nintendo (@japanese3ds) April 14, 2018