I hoped that they would bring back a cul-de-sac that looks like Grove Street as an Easter Egg to find in freeroam. I certainly wasn't sure it would happen or even if it would still be called Grove St. I hope the new Grove St still looks like an updated version of the old one with the recognisable houses of CJ , Sweet, Ryder and OG Loc, but I'm still not convinced that will be the case. I was disappointed with the rumoured "Leone Mansion" reported before the release of IV as it looked very different when I eventually saw it and I'm not convinced it was ever a deliberate remake.
I thought the gangs would be back though wasn't certain if they'd keep the same names or colours. I strongly doubt we'll get any reference or mention of any particular characters from San Andreas beyond graffiti or background photos / images. In which case they would only be there as fun things for the fans to spot rather than anything deeper.
My own take on the universes is that anything that happened in the 3D universe can also have happened in the HD universe unless it is directly contradicted in the new universe. Essentially Rockstar have a clean slate to start afresh, but they can re-use anything they want if it fits and doesn't restrict the current story / design.
The great thing about Grove Street for me is simply nostalgia. It was home in San Andreas. The game began and ended there. If it appears in a similar state in the new game it will just be a happy reminder of good times.
Edited by carpetdweller, 07 September 2013 - 10:50 AM.