Can I convert Google Sheets to PowerPoint and Upload into Storyline?

I spent a lot of time creating an e-learning template for my company. No animation and nothing fancy, just general layouts for title pages, objectives, video launch, information, and interactions.
I created all this in a PowerPoint deck so it could easily be reviewed by our branding group. I'm being requested to upload the Power Point to Google Sheets for review. Then once I have the feedback, presumably I'd download as a PowerPoint again before uploading to Storyline.
I'm worried about corruption. Am I right to worry, or being paranoid?

Thanks.

Robert