そんな計画はほとんど成功する見込みはありません。の英語

Such a plan can hardly succeed.

The plan is bound to succeed.

It is yet to be seen whether this plan will succeed or not.

The plan isn't a starter, I'm afraid.

Those plans won't really go as hoped.

Such a plan is bound to fail.

I'm afraid the project wouldn't pay off.

This plan doesn't have any chance at all [whatsoever] of success.

His plan has never succeeded even once so far.

His plan is s non-starter.

Little did I imagine that my plan would go wrong.

The plan did not work well in practice.

None of these plans ever come anywhere near realization.

We heard with regret that you were not successful in your plan.

There is little merit in this plan.

There is an impossibility in this plan.

I don't feel that it's a very good plan.

The plan is not mature.

That plan will probably fail in the long run.

The plan was destined to miscarry.

That is not a good plan.

Practically, the plan didn't work well.

That plan resulted with failure.

There are a lot of maybes in this project.

This plan is impossible to accomplish.

The project was a complete failure.

Under no circumstances can the scheme be put into practice.

I don't see why this plan isn't working well.

The plan has little appeal for [to] me.

It's just a sketch of the plan.