Return a view model from an Action Filter

I’ve got a requirement where I need to intercept the ‘BlogCommentAdd’.

I don’t want to override the entire blog post, as there’s various plugins (Rich Blog for instance), so I’ve looked at Action filters.

I can intercept the BlogCommentAdd no problem via an Action Filter, but once I’ve done my checks, I either need the rest of the source method to run as normal (by just returning from the action), or, return back the view with a new model, and any error associated messages.

I can’t for the life of me, figure out how to return the blogpost view from within the action filter!!

Any help would be much appreciated :)