I would LOVE to see Yakuza 1 and 2 in HD. At this point in time though, considering Sega’s financial stability and Yakuza’s niche cult status, I doubt there’s any plans for it.
I think a more likely scenario would be for a PS2 classics release on the PSN. It would be a great way for others to experience the games and a cheaper entry point would be a great way to get new fans in to the series!
We can always dream!