i'd love to see them re-enter that space but given haiku 5 never happened I wouldn't bet on it
i think they see what openai charges for luna and just don't want to try and compete
But they literally stated that they would release Sonnet 5.5 and Haiku 5.5 after Opus 5.5 was released
they've already said in both the opus 5.5 and sonnet 5.5 blog posts that haiku 5.5 is coming
They did mention in the Opus 5.5 announcement blogpost that Sonnet and Haiku 5.5 will follow soon.