Not sure on this one. We already have 2019 mbas released so it doesn't make sense that they release another one a few months later. Maybe if they name it "late 2019 mba" it would make sense. Apple historically has done something similar before only for mbps, but never for mbas.
Even if they release one w/ scissor keyboards, it would not make me go out and buy another one. Wait for next year folks, arm mbas are coming w/ better performances and incredible battery life. I'd personally wait for 2nd gen arm mbas so that apple had time to work out kinks and quirks that 1st gens usually have.