A bit late to do anything now, so here it is DLC wise:
There is NO DLC for this week (unless you have the Golden Pack).
However, you can now gain access to Shadow Dragon characters and Paralogue 19 via Spotpass, so I guess that's all good!
Finally, note that this is the last week of the Marth DLC being free. So, if you haven't already, download it!
Will go more in-depth tomorrow, with stats. etc.