Blood clots coming out of Tummy Tuck incision. What can I expect to happen now? What's best way to treat this? (photos)

This is consistent with a collection of blood under the skin flap.  I don't know why the drain was in place so long, but your story is in line with what is expected once a collection of blood turns liquid and starts to drain out.  This usually resolves without too much trouble, but your surgeon should be seeing you frequently until things are better.   

It appears the abdominoplasty incision has dehisced secondary to a hematoma underneath it.  Now that the hematoma has been drained, it may be possible to reclose this incision under local anesthesia in the office.  Discuss this with your surgeon

Thank you for your pictures. If this has happened just right after you will always a little trauma from the drain removal. This should readily subside. Your plastic surgeon should follow you closely to make sure that you have a reasonable outcome. Earl Stephenson, Jr, MD, DDS, FACS

a day ago... hopefully it has subsided by now.  But as the others have mentioned, you should see your surgeon about this.  When similar things happen with my patients, its usually because there was a small hematoma and now its finding an easy out following removal of the drain.  But if you encounter bright red bleeding and saturation of your dressings, you MUST contact your surgeon as you now have an urgent issue.

These are ALLL issues that need immediate attention from your surgeon!!! Over the internet we CAN NOT diagnose or treat....