:)

I think, since we don't realy know what arin's doing ...   we could speculate :)

but:
  1) unreachable publication point / CA == 'ok, see you in 30 mins on my next cycle through the world' (no real changes)

  b) revoking some portion of their claimed resources in various forms of CA == 'ideally a bunch of routes suddenly go unknown' == 'ok'

 iii) making a bunch of validatable changes to ROA/certs/content == 'worse possible outcome, likely to make a bunch of routes invalid'

In case of b or iii I'd expect we'll see some fun times in BGP, either 'a bunch of re-announcement' or 'a bunch of withdrawals and disasters' :)

I'm sure we'll learn something though?