We do know that Scott and Jean will have some sort of role to play coming up in the story. Scott has a plan involving transportation and communication. Jean seems to be playing a part by trying to break through to Otherworld telepathically -working with other telepaths to do so. This was stated in the last Cable issue (the last time we saw Scott and Jean). So it might be just symbolic that Yu gave them swords in this variant cover.
However, there are other covers that show Doug missing from the team and there is supposed to be an un-revealed 10th member.
I am loving X of Swords but I will be excited to see Scott and Jean show back up in the story.