Kidney names his party for New Zealand at lunchtime on Monday with most of the names picking themselves.
But the identity of who will supply back-up to Rob Kearney in the number 15 jersey is unknown, with the decision potentially having repercussions for the back three.
Felix Jones, who had an outside chance of making the squad, has been ruled out of contention after sustaining a foot injury in Saturday's 26-22 defeat by France.
Geordan Murphy was picked to play for the second string against Connacht in midweek, so it would take a U-turn for Kidney to turn to the Leicester three-quarter now.
Luke Fitzgerald and Keith Earls are options, though neither are specialists in the position.
Openside David Wallace was withdrawn from the team to face France at Aviva Stadium because of a hamstring strain, but is expected to be fit.
His fellow back row Stephen Ferris, a destructive blindside when fit, is sure to be included after negotiating 20 minutes yesterday.
Hooker Jerry Flannery, who has been dogged by calf injuries for the past year, will also travel after playing 60 minutes across three games so far this month.
Once Kidney has unveiled his squad, he must turn his attention to halting a run of three successive defeats.
England complete Ireland's pre-World Cup schedule when they visit Dublin on Saturday and Flannery accepts the match has now assumed greater significance.
"Last weekend in Bordeaux we were pleased that we finished strongly against France," said Flannery.
"Things seemed to be coming right and we thought 'we'll apply it to next week'.
"But we can't keep saying next week, next week. It's professional rugby and we're judged on results.
"You have to get it right sooner or later. We were too sloppy for periods and the French exploited that.
"The result against England was always going to important, regardless of what happened against France. It was always going to be huge.
"But for us things have been heightened a little bit because we've had three losses on the bounce.
"We're trying to go into the World Cup in a good frame of mind and that will be based on victory."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
$29.99
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
