Found on OG:
This ties in neatly with my theory as to the whole Rose story arc is going to end up. From comments made by RTD he has hinted that the clue to how things end up finally is there at the start of the very first episode. My hunch is that the Mickey will become that person who Rose has been looking for as described above through some selfless act of heroism. Either she’ll realise it too late or work it out and leave the Doctor for him. It ties in also with the theme of the show of the Doctor being a catalyst for people to aspire to a better way of life. Enough waffle anyway!
I HAVE BEEN THINKING THIS
AND RATHER WANTING TO WRITE IT FOR AGEEEEES.
*pokes above post* There’s no spoilers in there, is there? I can’t see any, but that might just be me.