With the topic of Suicune, I really doubt that the remake may follow the same storyline with it. The reason I say this is because the game is a Gold and Silver remake and not a Crystal remake. Though, it may have a slim chance of it being part of the game, I strongly believe it'll be like how it was in the original Gold and Silver. This of course is when it was seen running out of the Burnt Towers with its other two counterparts: Entei and Raikou. I actually remember this fairly well in the originals and I even remember when I had a crash landing one time with Entei. I never was able to catch it at that time because I wasn't expecting it. This will be a different story however in the remake. I'm hoping the three legendary beasts will be found running wild around Johto again. It will just add to the essence of nostalgia and make the game all more worthwhile. Plus, I want to catch them again with better IVs than what they had set back in FireRed and LeafGreen. Like mentioned, they are the only three trio legendaries not able to be caught in the 4th Generation games so I think it is pretty possible to expect them once again, along with hopefully a new sprite as well.
Also, on Celebi, it is true. It'll more than likely to be held as an event as all of Sinnoh's cute legendaries had their event and Mew and Jirachi had one as well. So, I won't be pushing this thought asise as yet. Though on the comment on having Mew and Jirachi available in-game og HeartGold and SoulSilver, I doubt it. Even though we are almost allowed every Pokémon now, there are some they won't single handedly give out so easily. More than likely events are held for Pokémon such as Celebi, Mew, Jirachi, and of course we recently had the event for Shaymin.
