[avenger123]

I am assuming that the intention of the talk is to convince others within the company to use this framework. So, in a sense, this is a sales pitch.

What I would suggest is to take some time and make a list of all the possible objections as to why anyone in the audience would not want to use your framework. Put yourself in their shoes. Try really hard to see from their point of view. Once you've done that, now go through each one and come up with real answers to each objection as to why they should use the framework.

For some of the reasons for not using the framework, you will not have a good answer (ie. its hard to argue too much with "we have million+ line of code and using your framework doesn't add any value") but for a lot of it, given some thought you should come up with a reasonable argument for your framework.

Once you've done this, you can now implicitly incorporate some of the answers to the objections in your presentation without explicitly mentioning the objection. You will also have given yourself a great chance at answering some good questions that will come up that will likely touch upon these areas.