The thing that's been largely overlooked, except by OSM, is that the ENTIRE LIST of E3 "rumors/leaks" noted on this board have come true now--even this one about Simon that some said was far-fetetched--except for the new Castlevania game project. So, if Ridley and Ice Climbers and Simon were real, and the Resident Evil 2 Remake for PS4 was real...I think we may be looking at least at a teaser of a new Castlevania game (or a collection) by the time E3 2019 rolls around.*
*I'm having trouble remembering if the "collection" in the rumors was just Hyper Sports R or not. But there was definitely a second "game" mentioned by Gamekult and at least one other source that seemed to strongly suggest a new Castlevania game. One "leaker," went so far as to note it was to counter Bloodstained's rise, as I recall. And given Konami's statements about Switch during Bomberman R, and all this Smash Bros action, it could be that Switch will be the test system for the revival.