Valdes failed to mention Jay Garrick, Jesse Quick, Harrison Wells, and others in that new Team Flash roster, so maybe they aren’t around as much following the immediate help they gave in the finale?
Whether that solution Carlos Valdes mentions is finding a way to rescue Barry or something else, Team Flash appears to include Caitlin Snow after she announced she was out of Team Flash in the Season 3 finale.
He also didn’t mention Caitlin, either, so maybe he was just airing on the side of caution and not wanting to reveal too much.
While it seems highly unlikely that The Flash is going to go an entire season without Barry Allen, it may be the team is without him longer than they have been in the past.