Very believable to me. Sinn Fein has predictably already called for a vote in Northern Ireland. Calls are growing for a second referendum in Scotland. There are even those wanting independence for London...

Scottish independence is likely - the question is just how firm the polls need to be before the SNP go there again.

The Northern Ireland potentially rejoining The Irish Republic is a bit surprising to me. Does anyone know if there's actually any chance of that happening?

The chance is very low given the amount of unionists, but that won't stop this being used for what its worth to force re-assessments of agreements etc. Expect the Northern Ireland government to be given a slew of new devolved powers etc. over the next few years as concessions to prevent growing calls for it.

What are the odds of violence popping up again?

We've recently had the threat level for that type of violence raised.

Depends on the number of unionists who are more pro-EU than pro-UK. It's not as likely as Scotland leaving (which is very likely), but I suppose it could happen.

It's not cynical at all. Look at the media reports coming out now from Scotland and Northern Ireland. Leaders are already talking it up and it's hard to deny the strength of their vote to remain within the EU.