Toyota is really marketwise company and they are aware of the negative branch reception of this purchase.
They will probably use some marketing tools (like pricing, warranty policy, etc.) to keep the attachment markeshare.

We must be aware, that such ventures already happened on the market.
Linde utilized Clark hydrokinetic transmissions for their heavy trucks in 90-s.
Combilift uses Linde hydrostatic transmission, etc.
Not to mention the engine manufacturers like Mitsubishi or Hyunday supplying the stuff to their competitors.
From the other hand there is Juli factory in Czech owned by Jungheinrich and Linde and manufacturing the electric motors for both + Still + who know else.

We have the Europe or US centric view on Toyota. The company is winning on our markets with the european or american brands and we don't like it.
But I think, even if it takes some time (rather short, IMHO), everybody gets used to the new Cascade/Toyota, and they will maintain, or even raise their market position.

NOTE - I don't work for Toyota. Personally and profesionally I prefer Linde.