Hi RoadRunner,
there will almost certainly be a new WRS qualifier in GT5 and as far as I know the current GT5P WRS leader board will be wiped clean so that everyone will have to qualify again before they can compete in the GT5 WRS. This will obviously take a little while for the race admins to sort out so I wouldn't expect WRS events as soon as GT5 is released, besides we'll need to progress in GT Mode to acquire the cars to fill out our garage. If you're not going to participate in the few remaining GT5P WRS events then there probably isn't much point doing the current qualifier now although it's very good practice for GT5.
It's not a set group. WRS will continue in GT5 and you'll definitely be able to qualify in it. Also until GT5 is released and we know all the features we don't know if it will support clan/team tags and therefore if the GTP_PSN ID's will still be essential...in case you were considering creating one
Are you changing your GTPlanet username from lildomplaya to DomSupra?