Interesting - this actually may be coming to fruition - Fruit of the Looms in First? I do like the QF A380 J service - put on your Peter Morrissey designed pyjamas, FA cheerfully hangs clothing in a hanging locker / closet, cheerfully returns them in the morning... and I always use the larger, handicapped lav to change, because I am 6'4" / 193 cm, but not a contortionist.
I'm not going to hold my breath for pyjamas on Iberia, since there is no First.
We can now expect a post that expresses horror at the oversight of pyjamas on AA F on a shorter-haul or daylight flight and ensuing request for compo. (I imagine too many of those transmogrify your eagles into turkey cultures.)