Historically, the third quarter catalogs have the midseason form first, the second Rider's final form second (if applicable, otherwise a movie toy or a new Rider goes here), and the titular Rider's final form. Fourth quarter is just the summer movie's toys, so this would be their last big push for toy sales.
They MIGHT forgo the midseason, yes, but only if they think that it would profit them to skip it this year, though seeing how we still got a new transformation device in the Q2 scans just not in belt form (Secondary Belts don't sell as well as the main character's) it's likely that we'll still see a midseason form, maybe with a unique touch to it to make it more marketable because the other options would be throwing a fourth Rider in with a new gimmick toy or forgoing a toy at all.