My guess, is that they may be planning of Sesame for 2021, considering it is seeming to be a small year for Orlando.
It could make sense for San Diego to then follow suit.
18: Electric Eel (Major)
19: Tidal Twister/Journey to Atlantis Upgrade's/Retracking (Semi-Major?)
20: Mako (Major)
21: Sesame Street (Minor)
What excites me most about Mako, is that it'll be the first Mini-Dive coaster in the United States for B&M, and considering the praise that Baron has had