How would we know? I'm not across (or even particularly interested) in who or what other clubs might or might not select in the draft.
Aish is a former No. 7 pick, 19 years of age with 32 senior games under his belt. Twice U18 All Australian in 2012 and 2013. Now if clubs want to take a player whose had two years experience in the system ahead of an 18 year old somewhere in the first round for a pick, then they'll do so.
Likely draft order might be:
1. Carlton (Weitering or Schache) - 3,000
2. Brisbane Lions (Schache or Weitering) - 2,517
3. Gold Coast - 2,234
4. Essendon - 2,034
5. Essendon (from St Kilda for Carlisle) - 1,878
6. Melbourne - 1,751
7. GWS (from Collingwood for Treloar) - 1,644
8. GWS - 1,551
9. Adelaide (from Geelong for Dangerfield) - 1,469
10. Port Adelaide - 1,395
11. Western Bulldogs - 1,329
12. Richmond - 1,268
13. Adelaide - 1,212
14. Sydney - 1,161
15. North Melbourne 1,112
16. Fremantle - 1,067
17. West Coast (Brisbane in possible Redden trade?) - 1,025
18. Hawthorn - 985
19. Gold Coast (comp.) - 948
20. Carlton - 912
21. Brisbane Lions - 878
22. Brisbane Lions (Leuenberger Band 3) - 845
23. Gold Coast - 815
24. Essendon - 785
25. Collingwood - 756 (from St Kilda Freeman trade)
26. Melbourne - 729
27. Collingwood - 703
If Collingwood think he'll slip through to 25 in the National Draft then all they need to do is make trade offers that they know Brisbane won't accept and take their chances. Keep 7 and take him there.