In an edition of Australian Aviation Magazine last year there was an article of a visit to the Canberra by a team from the Magazine and they talked to the Air Boss (the RANs first since the days of the Carrier Melbourne). He talked about cross decking AH-1Zs and UH-1Ys, no mention of CH-53s and MV-22s. I wonder if they have been added or a change has been made to the program. Either way all these aircraft will have to qualified to operate of the Canberra first.
The priority would be given to equipment we are likely to buy in the near term. Like AH-1Z.. Its something we are likely to buy, it was announced in the white paper, so obviously operating them off the LHD's would be a priority.
Ch-53, MV-22 and F-35B we aren't likely to procure immediately. We aren't likely to operate them off the LHD immediately. That's not to say people aren't looking at it, Spain operates a similar LHD and has been extensively looking at the MV-22. I would imagine Spain would most likely be the first to get a F-35B on the LHD deck. They are already operating harriers off them, they could see F-35B compatibility being a selling point for the LHD.
Australia will be pretty tied up trying to build this massive Amphibious capability. We really don't have time to do a whole lot of other things (other than the missions like Fiji). Spain does and will. Which is fine, as anything that they do with the USMC can most likely be recycled and provide information for the ADF.
I wouldn't be surprised if the MV-22 success operating off the spanish LHD means that is something Australia might want to look at cross decking in 2018+.