I have a proposal for #Markdown. Currently image tags are:

I propose the following be adapted, to allow for alignment embedded in the tag:
!<[image caption](image url) -- Align left
!>[image caption](image url) -- Align right
If the use of < and > is problematic, then it could be handled like table headers
!:--[image caption](image url)
!--:[image caption](image url)