Digitimes forecasts: often wrong
Ming Chi Kuo: the best(?) of the prognosticators who gets paid to do so?
My bet would be with Kuo, meaning 2024. Why? If one was coming, it would almost certainly be an October event/press release and how many rumors of this are flying as of Sep 25? And what else would make up an October event? I very much doubt an M3iMac though I could see an M2 one. Roll out the lone M3 Mac now and create the psychological effect that all of the other Macs (and upcoming Vpro) are "old tech" reversing how iMac is viewed now as the only one with "old tech" inside. M2 would just get the last holdout brought "up to date" and still make sense vs. an M2 Vpro releasing in 3-6 months (else that one would need to switch to M3, which is also plausible).
There's that iPad Air update rumor.
Otherwise??? Seems like crickets. Accessories going USB-C seems they would be on a schedule of when their existing inventories get low enough and then the USB-C versions just take over as Lightning inventory sells out.
Is M2 iMac, updated Air and Mini enough for an hour or two Campus video event? I think not. Is it enough for a press release (updates)? That seems favorable if anything. However, as of Sep 25, I'd expect flurries of rumors about all 3 now: colors, cables, features, photos, cases, etc. Where's that flurry?
That shared, anything updated is always welcomed. Bring on the new as soon as it is ready.