I love me some Splinter Cell, and do very much want a new one. But as I understand it, my perspective on the series is a little different from the norm, due to my entry point.
I played Conviction first, because this one time I happened to be stuck at my parents' place for a while, and all they had was one of those "Mac" things. So I was browsing Steam to see if it played anything, and lo and behold, there was SC: Conviction. I wasn't familiar with the series beyond general awareness, but since there seemed to be a limited selection and I was in the mood for some AAA production values, I picked it up. And I really enjoyed it a lot, thought it was a great shooter with robust stealth elements. And eventually I came to play it on all three platforms it was available on (I think). I mean, I had to pick up the 360 version to solo the split screen co-op on two controllers, since it was only in that one.
After that I went back and played Double Agent and found it OK but not great (on 360, I hear the older gen version is very different and superior), and eventually Chaos Theory. Which I could absolutely recognize as a true classic, only I could never get very deep into it, for the annoying reason that it gave me nasty motion sickness. So I didn't bother with the first one, and Pandora Tomorrow isn't even readily available.
So what this means is that I never had the abiding, sentimental love for the purer stealth approach that all those OG Splinter Cell fans have, though I can certainly respect that and understand why they find the more recent games "dumbed down for the masses" or something along those lines. Still, I liked how Blacklist seemed to take a step back towards greater emphasis on stealth, and overall found it an enjoyable experience, although there were some puzzling decisions made there (like a freaking FPS section, that was just... eugh). And of course, WHERE'S MUH IRONSIDE, DAMN IT?! Now that really flattened the character.
Anyway, yeah, bring on a new SC, please. Only I'm not quite sure what to wish for. Used to be I thought it should be much more open-worldy, but now I kind of have reservations about that approach, how it diffuses intensity and whatnot. And if they can't bring back Mr. Ironside, maybe they should consider going with a new character... or possibly a couple of them to choose from. (No obnoxious "Grrl Power!" cheerleading if female though, thx!) Storywise... eh, maybe keep it somewhat professional. I feel the whole "Let's make Sam Fisher moar human by introducing family members" thing kind of broke something. Someone can be human without going "Noooooo! Saaaaraaaaah!" at regular intervals if there's a personality there.
Edit: Just to clarify a bit, I found Double Agent "OK" (and merely that) in gameplay. The storyline, I think, was a huge misstep. And introducing a limited element of choice just seemed to create further complications for further developments.