Injured Adelaide captain Nathan van Berlo believes a twilight or night AFL grand final is on the way - and wants it sooner than later.

''It is inevitable at some point,'' he said. ''How soon I am not so sure. Personally, night games are my favourite games to play in. I love the atmosphere they bring. It is something different that will come to our great game at some point in the near future hopefully.''

It was one of the issues informally discussed during Wednesday's AFL season launch featuring the 17 captains and two co-captains at Adelaide Oval.

Van Berlo discarded his crutches for the special group photo and expects to start walking without them and a ''moon boot'' at training within two weeks in his desperate bid to play this season. He tore his Achilles tendon on a weights pulley during a training accident last month.

He has spoken to North Melbourne's Andrew Swallow and Hawthorn's Jarryd Roughead in recent weeks about their recovery process from similar injuries.

''I spoke to them in regard to milestones they had and timeframes they were looking at,'' van Berlo said. ''It's really too hard at the moment to put a date on when it [his return to playing] might be, but there is no reason if all goes well that I can't do my best to be back before the season is out.''

Adelaide appointed Patrick Dangerfield and Rory Sloane as co-caretaker captains, ignoring the opportunity to replace van Berlo, 27, after three years at the helm.

''That decision was made for me. I saw it as a really good opportunity to develop other leaders in the group.''