Marvelous News have published some photos taken from SDCC 2013 of the newest announced Marvel Universe figure range that include Northstar & Aurora:
The price on the display card indicate that they will be released seperately rather than a two pack, but this isn't confirmed yet.
Either way they mark the third/fourth Alphans in the line after Puck & Guardian.
With thanks to Marvelous News.
*UPDATE*
The packing shot seems to imply that the two figures are interchangeable in one packaging:
Mike Deodato has published the full artwork for the packaging on his tumblr:
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