If it's confirmed, we can expect high definition visuals on the levels, characters, enemies, landscapes, etc. And there maybe even in-game changes. But I can also see many possible fan complaints when the debut trailer/screenshots are released.
- Spyro's classic design is used, but tweaked (different eye color, body shape, etc.).
- Spyro's Skylander design is used instead for the younger generation who were introduced to Spyro in Skylanders (definite fan backlash)
- Gameplay mechanics may change slightly
- Slight cutscene changes
- Different voice actor for Spyro (instead of Tom Kenny or Carlos Alazraqui)
- A different game developer for the remasters was chosen other than Insomniac Games/Sony
- Stewart Copeland not returning, but his music for the PS1 trilogy is still used but remixed
- Different voice actors for Hunter, Elora, Moneybags, Ripto, Bianca, etc., other than the ones from the original games
In the end, fans may need to prepare that if there are remasters for the original Spyro trilogy, there will be some changes in those remakes that may displease them. And we'll also have the possibility of some fans just plainly saying "you ruined the games". You have the levels, characters, and boss battles in high definition, but even then, as most fans would say, the remasters are just the same games after all.