The HB superheroes could all use live action reboots.
Jonny Quest should have a series on The CW once the film that has been stalling is finally released (the series would pick up where the film left off), with the first season containing a 2-part storyline which serves as a reunion for the MacGyver reboot, featuring actors from that series reprising their roles on that show. Somehow I would also like a crossover with the Magnum PI reboot. These events would establish the live action Quest works as part of the Belisarioverse.
The other HB superheroes should have live action series on HBOmax that are part of the DC TV multiverse.
All of these shows would be co-produced by Greg Berlanti.
Jonny Quest, a la Berlanti? No thanks. We have enough shows with the same tiring format on the CW now, Kung Fu being the latest.
For as long as that movie's been in turnaround, the more likely it is it never got past the talking stage. 'Sides, they need a way younger protagonist than Zac Efron, who'd been attached.
None of the HB heroes should be in live-action form. Shazzan you could do with CGI, but then you have to find human actors of an appropriate age to play Chuck & Nancy. Unfortunately, Shazzan & Arabian Knights can't be done in the modern era, because despite the characters being portrayed in a positive light, there are stereotypes to be addressed, I think.
I think you may be a bit salty because the current MacGyver has come to an end.
Something to consider:
MacGyver is owned by ViacomCBS. Magnum PI is shared by ViacomCBS & NBCUniversal. They don't mix well with WB properties, contrary to your supposition.