I am planning to apply this year to several Ph.D. programs at several Canadian universities. The universities I've picked require Ph.D. applicants to secure a potential supervisor before submitting their applications. So far, one professor has responded to my request for supervision, but his response is simply that I can write his name down in my application as my potential supervisor and let the admission committee decide on my application. He hasn't commented on my research abstract or asked for a copy of my full research proposal. I asked him if he wanted to read my complete proposal, but he hasn't replied yet. Overall, he appears nonchalant about supervising me.
Supposing he's the only person at his university to express interest in supervising me, is his vague interest in my research proposal sufficient for this university's Ph.D. admission committee to consider him as my potential supervisor and give my application due consideration?