My guesses for this year,
After the release of Stamp! they will keep releasing two more singles until the next album, like they usually do. Or go for a different route to make a mini album, which will be neat.
For their 10th anniversary next year.
Release a album with 10 songs, all written by the members hopefully
Perform at a big 10 th anniversary concert in Japan, Most likey Osaka Jo Hall, (Most likey this live won't be filmed since this a very special kind of concert and concert goers are only to see it, which is unfair to peeps who can't go, like me, )
Do a movie documentary about the band throughout the years, mostly release in theaters or DVDs.
Or going on a tour to 10 different places, whether Japan or Overseas.
Next year in general:
More singles, and a new album, since I doubt they will release a full new album this year.
Another world tour, since they pretty much say they wanted to do it...eventhough it's not confirmed.
I kinda don't want them to put out a compilation album, I never got the whole idea of it, it just having pre release songs (some of them not even hits) and putting them onto one disk. Unless they are doing something extra special to CD.
But my ultimate guess is that they release there 7th album (next one) on their anniversary, August 21st, if they do I hope its has qualities of STANDARD and Hello World . Having all out power rock songs from Standard but still have organic deep band like songs from Hello World. But I will look forward to if they finally put out a studio ver. of Ashita no Ashita.
But Scandal did say they were gonna do something big and surprising for the 10th b day next year, so we won't know for sure. My predictions are probably wishful thinkng