I honestly think Capcom is treading on very dangerous waters. RE4 is a beloved game. Maybe even more than RE2, since a lot of fans started with 4. Not only that, it's still the series's best reviewed title. A game that frequently appears on "best games of all time" and "Most influential games of all time" lists and more than that, a personal favorite of a lot of fans (It was my favorite for a long time, until RE2R pushed it down). Any change that the game might have (and will have, let's be honest. There'll be some missing enemy, or some cut location, or some different scenario. I doubt it'll be an 1:1 recreation of RE4 with better graphics and updated gameplay. There will be changes.) will stirr the fanbase in a meltdown. And I can kind see some changes coming that might upset the fanbase (example...Leon's over the top acrobatic moves, some of the cheesy dialogue lines...things like that, since ever RE7 Capcom is trying to take the series into a more "realistic", "serious" storyline and RE4 is the complete opposite of it...and maybe that might one of the reasons on why it's so fun). This is a dangerous move, really.
And the bottom line of it...a very unnecessary move. RE4 still pretty much holds its own in every department, all while Code Veronica could benefit SO FREAKING MUCH on a Remake.