Coulter-Nile, 25, sealed selection to play the West Indies in Brisabne on Wednesday with a match-winning nine-wicket game haul in a stunning Sheffield Shield win over Queensland at the Gabba.
He is widely considered a potential future all-round talent for all three forms of the game, while he possibly appeals mostly as a limited-overs specialist.
Controversial former great Shane Warne has called for Coulter-Nile to be a regular in Australia's T20, 50-50 and Test teams.
The powerhouse all-rounder, who has been on the brink of a senior international call-up for much of this summer, joins exciting paceman Josh Hazlewood as he continues a comeback from nagging injury and power-hitter Ben Rohrer in the 12-man unit for the one-off clash.
Veteran wicketkeeper Brad Haddin is also back after recovering from a hamstring strain and being withdrawn from a Shield match for New South Wales this week.
Haddin, 35, is also expected to play in Australia's final one-day international against the Windies in Melbourne on Sunday after national team management ordered frontline gloveman Matthew Wade to head for India ahead of a four-Test series on the sub-continent starting on February 22.
Significantly, national management named the T20 unit with specific reference to their Big Bash franchises.
Coulter-Nile, Rohrer and other significant inclusions like Adam Voges from Perth, Aaron Finch from the Melbourne Renegades and Ben Laughlin with Hobart all had top BBL series this summer.
Australia's T20 squad for Wednesday is:
George Bailey (Hobart Hurricanes)
Nathan Coulter-Nile (Perth Scorchers)
Ben Cutting (Brisbane Heat)
James Faulkner (Melbourne Stars)
Aaron Finch (Melbourne Renegades)
Brad Haddin (Sydney Sixers)
Josh Hazlewood (Sydney Sixers)
Ben Laughlin (Hobart Hurricanes)
Clint McKay (Melbourne Stars)
Shaun Marsh (Perth Scorchers)
Ben Rohrer (Melbourne Renegades)
Adam Voges (Perth Scorchers)
Selection of the national squad was hindered with a host of regular T20 and one-day stars already on service in India preparing for resumption of Test commitments in such an anticipated series.
Wade, in-form seamer Mitchell Starc, all-rounder Glenn Maxwell and sppin specialist Xavier Doherty have been sent to the sub-coontinent in efforts for a swift switch from limited-over format to the longer form of the game.
Swashbuckling batsman Dave Warner continues on the sidelines as he recovers from a broken thumb and is also with the advance Test squad part in India.