Blathers I always end up picking through bags to find the ones with the right balance of colours too 
DW, I was only teasing - I think pretty socks would be nice, actually - Father Christmas always beings pants and socks in our household.
DT - I just checked - DS's secret agent/spy party was his 6th. Of course, your DS is almost certainly probably not as awkward as DS, and may well be fine with Super Hero Academy.
Star Wars party - we made light sabres out of pipe insulation but in much the same way as this woman did with pool noodles - except that we got the DC to make them (I seem to remember they coloured the handles in themselves and then we helped them tape it up). The hit of the party was "using the force" (and the light sabres) to keep a balloon in the air - we divided them into two teams and they had different colour balloons. They would have kept playing that one as long as we let them.
They also did pin the light sabre onto someone or other, and we themed pass the parcel (asteroids, iirc - foil wrapped!). Apart from some colouring, I think that was about it. There are some seriously OTT game ideas here though.
this was the cake, although I don't recommend it if you want to stay sane 
DT - it sounds as though you could write off Easter Sunday and do stuff your way on Easter Monday - especially if you have guests as an excuse.